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<html lang="en">

  <head>
    <meta charset="UTF-8">
    <title>06_面试题</title>
  </head>

  <body>

    <script type="text/javascript">
      /*
  测试题1
   */
      function A() {

      }
      A.prototype.n = 1

      var b = new A()

      A.prototype = {
        n: 2,
        m: 3
      }

      var c = new A()
      console.log(b.n, b.m, c.n, c.m) //1 undefined 2 3


      /*
       测试题2
       */
      // function F() {}
      // Object.prototype.a = function () {
      //   console.log('a()')
      // }
      // Function.prototype.b = function () {
      //   console.log('b()')
      // }

      // var f = new F()
      // f.a()
      // f.b()
      // F.a()
      // F.b()
      /* console.log(f)
      console.log(Object.prototype)
      console.log(Function.prototype)*/
    </script>
  </body>

</html>